{
  "manageEntity": {
    "action": "Create",
    "entityId": "1052598488",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"track_id\":1052598488,\"field_visibility\":{\"mood\":true,\"tags\":true,\"genre\":true,\"share\":true,\"play_count\":true,\"remixes\":true},\"genre\":\"Electronic\",\"isrc\":null,\"is_unlisted\":false,\"iswc\":null,\"license\":null,\"is_stream_gated\":false,\"stream_conditions\":null,\"allowed_api_keys\":null,\"is_download_gated\":false,\"download_conditions\":null,\"release_date\":\"2026-10-06T12:43:36.000Z\",\"title\":\"かたち\",\"duration\":212,\"audio_upload_id\":\"297a54381bda2bb3b71ff332185cb216\",\"track_cid\":\"baeaaaiqsea3icd5c2bknylzbjthgiih7a3k5xhvao6ipb3h7kqh32s45f4cgk\",\"preview_cid\":\"\",\"orig_file_cid\":\"baeaaaiqsedt3o3w2unif3she5qrd6show7fvqzk2sima2bidvyqpptrpf3eeo\",\"orig_filename\":\"かたち.MP3\",\"is_downloadable\":false,\"is_original_available\":false,\"is_playlist_upload\":true,\"ddex_release_ids\":null,\"ddex_app\":\"\",\"parental_warning_type\":null,\"bpm\":120,\"is_custom_bpm\":false,\"musical_key\":\"D flat major\",\"is_custom_musical_key\":false,\"comments_disabled\":false,\"is_scheduled_release\":false,\"owner_id\":266636478,\"audio_analysis_error_count\":0,\"cover_art_sizes\":\"baeaaaiqsedfvdb2cjgi4q4j7srfbqeqkraanxybuuhkg64kvo6znqxwhqmr6c\"}}",
    "nonce": "0xa511ebd35f03d87c3b7113681b076c8c54a2ffc31407ed5cb5ddfcda24cfefe9",
    "signature": "0xe439d48692ee26c80002dad25675f21015ba0afd64d5c6947d211634287becf90e94b8ddd84dad9e03d0140547d5e8c817a54d4cddbbd55f1a0532aa5fc198991b",
    "signer": "0x749c79C88202c35aEb047D355394D7bdeF1e960c",
    "userId": "266636478"
  }
}